State-Dependent Luminance Mapping for Coordinated HDR Visual Assets
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Solution Overview
Problem
Existing technologies struggle to efficiently process and display High Dynamic Range (HDR) images, particularly in systems with varying display capabilities, leading to issues such as clipping of bright objects and loss of detail in lower luminance areas.
Innovation Solution
A method for coordinated luminance processing that involves using a luminance mapping function to adjust HDR images to fit within the dynamic range of different displays, preserving chromaticity and saturation while optimizing luminance distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If HDR images are displayed on displays with limited dynamic range, then the display can show brighter colors, but bright objects clip and lose detail while dark areas become too dark to see
Solution Approach 1:
The patent applies dynamic luminance mapping that adapts to different display capabilities and content states. The system dynamically adjusts the luminance mapping function based on the display's maximum luminance capability and the content's luminance characteristics, allowing optimal visualization across varying conditions without fixed clipping thresholds
Solution Approach 2:
The system changes the luminance mapping parameters adaptively. Different luminance mapping functions are selected and adjusted based on content type, display capabilities, and viewing conditions. This includes adjusting mapping curves, gamma values, and luminance scaling factors to preserve detail across the dynamic range while preventing clipping
2Manufacturing precision
If luminance mapping functions are applied to coordinate visual assets from different creators, then visual fidelity is maintained, but processing complexity increases
Solution Approach 1:
The patent segments the luminance processing into independent, modular components: content analysis module, display capability detection module, luminance mapping function selection module, and coordinate transformation module. Each segment processes specific aspects independently, reducing overall processing complexity while maintaining visual fidelity through coordinated operation
Solution Approach 2:
The system introduces luminance mapping functions as intermediary transformation layers between content creation and display. These mapping functions act as mediators that translate luminance values from one reference state to another, coordinating visual assets from different creators without requiring direct complex interactions between all components
3Adaptability or versatility
If state-dependent luminance adjustment is implemented for visual assets, then visual assets adapt to different states, but the system complexity increases
Solution Approach 1:
The patent implements preliminary identification and classification of visual asset states before processing. The system pre-determines state parameters and prepares appropriate luminance mapping functions in advance, so that when assets need to be displayed in different states, the appropriate processing is already ready, reducing real-time computational complexity
Solution Approach 2:
The system creates universal luminance processing components that can handle multiple visual asset types and states through a single coherent framework. The same core algorithms and mapping functions serve multiple purposes across different content types, reducing overall system complexity while maintaining high state adaptability
Data Source
Figure 1A~1D
Figure 2
Figure 3A~3C
AI summary
To enable technical coordination of brightnesses of several visual assets potentially from different source locations and potentially different creators, a compositor circuit (850) is arranged to receive the visual assets (810, 800) to create a geometric composition (comp), wherein at least the second visual asset comprises at least a first luminance or luma mapping function (FL_DEF_2K) for transforming at least a luminance or luma of its pixel colors when the second visual asset is to be displayed as being in a first state (STLAB1int), and a second luminance or luma mapping function (FL_SEL_2K) when the second visual asset is to be displayed as being in a second state (STLAB2int), wherein the first and second luminance or luma mapping function are specified to give a conspicuous differential luminance appearance when mapping the second pixel colors of the second visual asset to a reference luminance range (RNG_RF); wherein the compositor comprises: - a state establishing circuit (851) arranged to establish a current state (CurST) of the second visual asset and is arranged to read a state-specific luminance or luma mapping function (FL_STSP) from the asset which satisfies the requirement that its associated state label corresponds to the current state.